Sildenafil Liqrev, Revatio is used to improve the ability to exercise in adults Liqrev, Revatio and children 1 year of age and older Revatio with pulmonary arterial hypertension PAH; high blood pressure in the vessels carrying blood to the lungs, causing shortness of breath, dizziness, and tiredness. Your doctor will tell you not to take sildenafil if you are taking street drugs containing nitrates. The titration studies, in which most patients received mg, showed similar results. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy NAION. Taking sildenafil alone will not cause an erection. Patients should always ask their doctors for medical advice about adverse events.AdEnjoy Greater Libido & Performance. Fast Express ries: Various · Best Sellers · Aphrodisiacs · All Products · Ubulawu Dream Herbs. AdDon’t go to the pharmacy without checking prices at GoodRx® first. No commitment or fees. Find the lowest price in your neighborhood & use our free coupons to save up to 80%No Credit Card Required · 5-Star Reviews · Over 70k Pharmacies””GoodRx can help you save, whether you have insurance or not.”” – Patch. Rarely reported side effects include: an erection that will not go away (priapism). If you have an erection that lasts more than 4 hours, get medical help right away. If it is not treated right away, priapism can permanently damage your penis. sudden vision loss in one or both eyes.